具有小负漂移的随机游动的阶梯期的过渡现象
Transition phenomena for ladder epochs of random walks with small negative drift
摘要:
对于一族满足$\mathbf{E}S_1^{(a)}=-a<0$的随机游动$\{S^{(a)}\}$,我们考虑梯历元$τ^{(a)}=\min\{k\geq1: S_k^{(a)}<0\}$。我们研究的渐近,作为$a\to0$,行为的$\mathbf{P}(τ^{(a)}>n)$的情况下,当$n=n(a)\to\infty$。作为结果,我们还获得了$τ^{(a)}$的时刻的增长率。
英文摘要:
For a family of random walks $\{S^{(a)}\}$ satisfying $\mathbf{E}S_1^{(a)}=-a<0$ we consider ladder epochs $τ^{(a)}=\min\{k\geq1: S_k^{(a)}<0\}$. We study the asymptotic, as $a\to0$, behaviour of $\mathbf{P}(τ^{(a)}>n)$ in the case when $n=n(a)\to\infty$. As a consequence we obtain also the growth rates of the moments of $τ^{(a)}$.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。